A self-proclaimed "knight" and his hapless squire travel the Spanish countryside, attacking "giants" that are really windmills in his attempt to win the love of the fair Dulcinea.

When a humorous script-reader in her New York apartment sees an ad in the Saturday Review of Literature for a bookstore in London that does mail order, she begins a very special correspondence and friendship with Frank Doel, the bookseller who works at Marks & Co., 84 Charing Cross Road.